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Securities - Schedule of Estimated Fair Value and Unrealized Losses for Debt Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | $ 192,500 | $ 171,376
Available-for-sale, Less than 12 months, Unrealized Losses | (295) | (264)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 242,833 | 451,856
Available-for-sale, 12 months or longer, Unrealized Losses | (16,916) | (26,117)
Available-for-sale, Total, Estimated Fair Value | 435,333 | 623,232
Available-for-sale, Total, Unrealized Losses | (17,211) | (26,381)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 6,317 | 124,433
Held-to-maturity, Less than 12 months, Unrealized Losses | (371) | (1,559)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 821,120 | 849,609
Held-to-maturity, 12 months or longer, Unrealized Losses | (70,994) | (92,424)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1 | 827,437 | 974,042
Held-to-maturity, total, unrealized losses | (71,365) | (93,983)
Total securities, Less than 12 months, Estimated Fair Value | 198,817 | 295,809
Total securities, Less than 12 months, Unrealized Losses | (666) | (1,823)
Total securities, 12 months or longer, Estimated Fair Value | 1,063,953 | 1,301,465
Total securities, 12 months or longer, Unrealized Losses | (87,910) | (118,541)
Total securities, Estimated Fair Value | 1,262,770 | 1,597,274
Total securities, Unrealized Losses | (88,576) | (120,364)
Mortgage-backed securities: |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 143,284 | 169,000
Available-for-sale, Less than 12 months, Unrealized Losses | (195) | (97)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 96,970 | 94,335
Available-for-sale, 12 months or longer, Unrealized Losses | (11,895) | (15,255)
Available-for-sale, Total, Estimated Fair Value | 240,254 | 263,335
Available-for-sale, Total, Unrealized Losses | (12,090) | (15,352)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 1,276 | 114,678
Held-to-maturity, Less than 12 months, Unrealized Losses | (10) | (1,063)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 607,246 | 599,712
Held-to-maturity, 12 months or longer, Unrealized Losses | (59,309) | (74,429)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1 | 608,522 | 714,390
Held-to-maturity, total, unrealized losses | (59,319) | (75,492)
U.S. government and agency obligations | Investment securities |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 2,103 | 833
Available-for-sale, Less than 12 months, Unrealized Losses | (6) | (2)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 50,871 | 59,861
Available-for-sale, 12 months or longer, Unrealized Losses | (4,173) | (5,794)
Available-for-sale, Total, Estimated Fair Value | 52,974 | 60,694
Available-for-sale, Total, Unrealized Losses | (4,179) | (5,796)
Corporate debt securities |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, total, unrealized losses | (1,378) | (3,941)
Corporate debt securities | Investment securities |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 4,788 | 1,543
Available-for-sale, Less than 12 months, Unrealized Losses | (54) | (165)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 5,988 | 6,116
Available-for-sale, 12 months or longer, Unrealized Losses | (741) | (816)
Available-for-sale, Total, Estimated Fair Value | 10,776 | 7,659
Available-for-sale, Total, Unrealized Losses | (795) | (981)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 0 | 3,084
Held-to-maturity, Less than 12 months, Unrealized Losses | 0 | (473)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 38,713 | 58,386
Held-to-maturity, 12 months or longer, Unrealized Losses | (1,378) | (3,468)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1 | 38,713 | 61,470
Held-to-maturity, total, unrealized losses | (1,378) | (3,941)
Asset-backed securities | Investment securities |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 42,325 | 0
Available-for-sale, Less than 12 months, Unrealized Losses | (40) | 0
Available-for-sale, 12 months or Longer, Estimated Fair Value | 89,004 | 291,544
Available-for-sale, 12 months or longer, Unrealized Losses | (107) | (4,252)
Available-for-sale, Total, Estimated Fair Value | 131,329 | 291,544
Available-for-sale, Total, Unrealized Losses | (147) | (4,252)
Agency residential |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, total, unrealized losses | (54,907) | (70,040)
Agency residential | Mortgage-backed securities: |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 143,284 | 169,000
Available-for-sale, Less than 12 months, Unrealized Losses | (195) | (97)
Available-for-sale, 12 months or Longer, Estimated Fair Value | 0 | 0
Available-for-sale, 12 months or longer, Unrealized Losses | 0 | 0
Available-for-sale, Total, Estimated Fair Value | 143,284 | 169,000
Available-for-sale, Total, Unrealized Losses | (195) | (97)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 0 | 95,776
Held-to-maturity, Less than 12 months, Unrealized Losses | 0 | (693)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 514,518 | 525,751
Held-to-maturity, 12 months or longer, Unrealized Losses | (54,907) | (69,347)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1 | 514,518 | 621,527
Held-to-maturity, total, unrealized losses | (54,907) | (70,040)
Agency commercial |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, total, unrealized losses | (3,435) | (3,678)
Agency commercial | Mortgage-backed securities: |  |
Debt securities available-for-sale: |  |
Available-for-sale, Less than 12 months, Estimated Fair Value | 0 | 0
Available-for-sale, Less than 12 months, Unrealized Losses | 0 | 0
Available-for-sale, 12 months or Longer, Estimated Fair Value | 96,970 | 94,335
Available-for-sale, 12 months or longer, Unrealized Losses | (11,895) | (15,255)
Available-for-sale, Total, Estimated Fair Value | 96,970 | 94,335
Available-for-sale, Total, Unrealized Losses | (11,895) | (15,255)
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 1,276 | 18,902
Held-to-maturity, Less than 12 months, Unrealized Losses | (10) | (370)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 73,251 | 55,051
Held-to-maturity, 12 months or longer, Unrealized Losses | (3,425) | (3,308)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1 | 74,527 | 73,953
Held-to-maturity, total, unrealized losses | (3,435) | (3,678)
State and municipal debt obligations |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, total, unrealized losses | (10,668) | (14,550)
State and municipal debt obligations | Investment securities |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 5,041 | 6,671
Held-to-maturity, Less than 12 months, Unrealized Losses | (361) | (23)
Held-to-maturity, 12 months or longer, Estimated Fair Value | 175,161 | 191,511
Held-to-maturity, 12 months or longer, Unrealized Losses | (10,307) | (14,527)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1 | 180,202 | 198,182
Held-to-maturity, total, unrealized losses | (10,668) | (14,550)
Non-agency commercial |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, total, unrealized losses | (977) | (1,774)
Non-agency commercial | Mortgage-backed securities: |  |
Debt securities held-to-maturity: |  |
Held-to-maturity, Less than 12 months, Estimated Fair Value | 0 | 0
Held-to-maturity, Less than 12 months, Unrealized Losses | 0 | 0
Held-to-maturity, 12 months or longer, Estimated Fair Value | 19,477 | 18,910
Held-to-maturity, 12 months or longer, Unrealized Losses | (977) | (1,774)
Held To Maturity Securities Continuous Unrealized Loss Position Fair Value1 | 19,477 | 18,910
Held-to-maturity, total, unrealized losses | $ (977) | $ (1,774)

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